| ??? 09/25/07 10:38 Read: times Msg Score: -1 -1 Answer is Wrong |
#144971 - SRAM Responding to: ???'s previous message |
89C2051 have a little problem it is short version of 8051 without external DATA.
If you can use any full version of uPC, you can store a data in external little SRAM (mayby 256 bajt) and use external Lithum batery to supply only this SRAM :). As I remember in hardware reset 8051 reset only internal RAM, an EXTERNAL is needed to clear by special software procedures, so you can treat it as mass storage, but very quickly. |
| Topic | Author | Date |
| Memory of AT89C2051 after reset | 01/01/70 00:00 | |
| this is relatively complicated... | 01/01/70 00:00 | |
| Why no reset during low power? | 01/01/70 00:00 | |
| during active reset the oscillator is running... | 01/01/70 00:00 | |
| power back up? | 01/01/70 00:00 | |
| Oh, certainly... | 01/01/70 00:00 | |
| thanks | 01/01/70 00:00 | |
| alternatives | 01/01/70 00:00 | |
| options? | 01/01/70 00:00 | |
| my way of doing this... | 01/01/70 00:00 | |
| Then jus a RAM chip would work | 01/01/70 00:00 | |
| wouldn't it be easier and safer with serial EEPROM | 01/01/70 00:00 | |
| Maybe | 01/01/70 00:00 | |
| why not FRAM | 01/01/70 00:00 | |
| Combination of Technologies.... | 01/01/70 00:00 | |
| SRAM | 01/01/70 00:00 | |
| I don't think so | 01/01/70 00:00 | |
| this is not matter of "thinking"! | 01/01/70 00:00 | |
| OK, an another gotcha | 01/01/70 00:00 | |
| to Jan | 01/01/70 00:00 | |
| no | 01/01/70 00:00 | |
here is the best chip for u! | 01/01/70 00:00 |